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1. 发明授权

US5627526A Proximity detection using DPSK waveform 失效
标题翻译：使用DPSK波形的接近检测
公开(公告)号：US5627526A
公开(公告)日：1997-05-06
申请号：US315348
申请日：1994-09-30
申请人： Donald K. Belcher , Albert D. Darby, Jr. , Lamar G. McBryde
发明人： Donald K. Belcher , Albert D. Darby, Jr. , Lamar G. McBryde
IPC分类号： G06K7/00 , G08B21/02 , G08C21/00
CPC分类号： G06K7/0008 , G08B21/02
摘要： A method and system for determining whether a transmitting unit is proximate a receiving unit wherein the transmitting unit includes a magnetic field generator for a providing a plurality of time-sequential magnetic fields, each of the sequences being a differential phase shift key (DPSK) modulated code. The magnetic field is transmitted at a relatively interference free frequency of 72 KHz and the DPSK modulation frequency is about 1200 bits per second. Each pair of transmitting and receiving unit uses with a distinguishing code selected from a predetermined group of generally orthogonal codes.
摘要翻译：一种用于确定发射单元是否靠近接收单元的方法和系统，其中所述发射单元包括用于提供多个时间顺序磁场的磁场发生器，所述序列中的每一个是差分相移键（DPSK）调制码。磁场以72KHz的相对无干扰频率发送，DPSK调制频率约为1200位/秒。每对发送和接收单元使用从预定的一般正交码组中选出的区别码。

2. 发明授权

US5765112A Low cost wide area network for data communication using outbound message specifying inbound message time and frequency 失效
标题翻译：低成本广域网，用于使用出站消息指定入站消息时间和频率进行数据通信
公开(公告)号：US5765112A
公开(公告)日：1998-06-09
申请号：US468004
申请日：1995-06-06
申请人： Brendan T. Fitzgerald , Andrew T. Powshok , Donald K. Belcher , Jeffrey R. White , Albert D. Darby, Jr. , Rodney Nelson
发明人： Brendan T. Fitzgerald , Andrew T. Powshok , Donald K. Belcher , Jeffrey R. White , Albert D. Darby, Jr. , Rodney Nelson
IPC分类号： H04W84/02 , H04B7/00
CPC分类号： H04W84/022
摘要： A two-way communications system that provides ubiquitous wireless data communication services, such as throughout the continental United States, by using a network of only a few, widely distributed radio base station (RBS) sites and the existing paging network infrastructure. The paging network infrastructure is used as an outbound link to request data from the remote field units. The outbound page message indicates a time and frequency at which the RBSs can expect to receive data from the field units. A network hub or message operations center (MOC) coordinates the operation of the paging systems and RBSs from a central location. For example, the MOC determines an available HF frequency and time for a particular field unit to transmit, and then issues the request for data to the field unit using the existing paging network infrastructure. The field units make use of paging receivers, and an HF transmitter to report remote data such as a geoposition or other sensor data when requested to do so.
摘要翻译：通过使用只有少数广泛分布的无线电基站（RBS）站点和现有寻呼网络基础设施的网络，提供普遍存在的无线数据通信服务的双向通信系统，例如遍布美国大陆的无线数据通信服务。寻呼网络基础设施用作出站链路以从远程现场单元请求数据。出站页面消息指示RBS可以期望从现场单元接收数据的时间和频率。网络集线器或消息操作中心（MOC）协调来自中心位置的寻呼系统和RBS的操作。例如，MOC确定特定现场单元发送的可用HF频率和时间，然后使用现有的寻呼网络基础设施向现场单元发出对数据的请求。现场单元利用寻呼接收机和HF发射机在请求时报告诸如地理位置或其他传感器数据的远程数据。

3. 发明授权

US5774502A Fully integrated data receiver and method for receiving on/off keyed AM/PDSK modulated signals 失效
标题翻译：完全集成的数据接收器和接收/关闭AM / PDSK调制信号的方法
公开(公告)号：US5774502A
公开(公告)日：1998-06-30
申请号：US752028
申请日：1996-11-19
申请人： Donald K. Belcher , Albert D. Darby, Jr. , Alexander J. Nadler
发明人： Donald K. Belcher , Albert D. Darby, Jr. , Alexander J. Nadler
IPC分类号： H04L27/38 , H03D5/00 , H03K9/00
CPC分类号： H04L27/389
摘要： A data transmission system in which an on/off keyed (OOK) AM/DPSK modulated data signal with an on/off ratio exceeding about 80 dB which has been modulated on a carrier is received at a compact, easily fabricated and battery powered data receiver which operates without automatic gain control and which includes a double loop antenna (diameter of about two inches) with a trimmer capacitor center tapped to the antenna for providing a conjugate impedance match between the antenna and a low noise amplifier. In the receiver, a square-law detection AM demodulator for demodulating the amplified signal is in a bipolar silicon IC, and a DPSK data detector for decoding the demodulated signal is in a separate digital CMOS IC.
摘要翻译：一种数据传输系统，其中在紧凑的，容易制造的和电池供电的数据接收器上接收具有已经在载波上调制的开/关比超过约80dB的开/关键控（OOK）AM / DPSK调制数据信号其在没有自动增益控制的情况下运行，并且包括双环形天线（直径约2英寸），其中微调电容器中心抽头到天线，以在天线和低噪声放大器之间提供共轭阻抗匹配。在接收机中，用于解调放大信号的平方律检波AM解调器是双极硅IC，用于解调解调信号的DPSK数据检测器是分开的数字CMOS IC。

4. 发明授权

US5734963A Remote initiated messaging apparatus and method in a two way wireless data communications network 失效
标题翻译：在双向无线数据通信网络中的远程发起的消息收发设备和方法
公开(公告)号：US5734963A
公开(公告)日：1998-03-31
申请号：US471980
申请日：1995-06-06
申请人： Brendan T. Fitzgerald , Andrew T. Powshok , Donald K. Belcher , Jeffrey R. White , Albert D. Darby, Jr. , Rodney Nelson
发明人： Brendan T. Fitzgerald , Andrew T. Powshok , Donald K. Belcher , Jeffrey R. White , Albert D. Darby, Jr. , Rodney Nelson
IPC分类号： H04L12/56 , H04W4/12 , H04W16/14 , H04W68/00 , H04W74/04 , H04W74/06 , H04Q7/20
CPC分类号： H04W74/06 , H04W4/12 , H04W48/10 , H04W84/022
摘要： A two-way communications system provides ubiquitous wireless data communication services, such as throughout the continental United States, by using a network of only a few, widely distributed radio base station (RBS) sites and the existing paging network infrastructure. A network hub or mission operation center (MOC) coordinates the operation of the paging systems and RBSs from a central location. The paging network infrastructure is used as an outbound link over which each of the field units is regularly provided with a outbound data message containing information on the available frequencies and time slots the field units can use to transmit inbound data messages to the RBSs. If any of the field units desires to transmit data to MOC, the field unit selects an available frequency from the outbound data message, and transmits its data at the selected available frequency and time. At least one of the RBSs will receive the inbound message and route it to the MOC which then sends an outbound acknowledgment message, via the paging network, to the field unit which sent the inbound message.
摘要翻译：双向通信系统通过仅使用几个广泛分布的无线电基站（RBS）站点和现有的寻呼网络基础设施的网络来提供无处不在的无线数据通信服务，例如遍布美国大陆的无线数据通信服务。网络中心或任务操作中心（MOC）协调来自中心位置的寻呼系统和RBS的操作。寻呼网络基础设施用作出站链路，每个现场单元定期地提供出站数据消息，该出站数据消息包含关于现场单元可用于向RBS发送入站数据消息的可用频率和时隙的信息。如果任何现场单元希望向MOC发送数据，则现场单元从出站数据消息中选择可用频率，并以所选择的可用频率和时间发送其数据。至少一个RBS将接收入站消息并将其路由到MOC，然后MOC通过寻呼网络向发送入站消息的现场单元发送出站确认消息。

5. 发明授权

US5640442A Technique for determining propagating and clear frequency to be used in wide area wireless data communications network 失效
标题翻译：确定在广域无线数据通信网络中使用的传播和清除频率的技术
公开(公告)号：US5640442A
公开(公告)日：1997-06-17
申请号：US719307
申请日：1996-09-24
申请人： Brendan T. Fitzgerald , Andrew T. Powshok , Donald K. Belcher , Jeffrey R. White , Albert D. Darby, Jr. , Rodney Nelson
发明人： Brendan T. Fitzgerald , Andrew T. Powshok , Donald K. Belcher , Jeffrey R. White , Albert D. Darby, Jr. , Rodney Nelson
IPC分类号： H04W72/06 , H04W84/02 , H04Q7/08
CPC分类号： H04W72/085 , H04W84/022
摘要： A two-way communications system that provides ubiquitous wireless data communication services, such as throughout the continental United States, by using a network of only a few, widely distributed radio base station (RBS) sites and the existing paging network infrastructure. The paging network infrastructure is used as an outbound link to request data from the remote field units. The outbound page message indicates a time and HF frequency at which the RBSs can expect to receive inbound data from the field units. A network hub or mission operation center (MOC) determines a radio frequency which is expected to be propagating and clear at the time that a particular field unit is to use the frequency as an inbound link. The MOC then issues the request for data to the field unit using an existing inexpensive wireless system such as the paging network infrastructure. The field units make use of paging receivers, and an HF transmitter to report remote data such as a geoposition or other sensor data when requested to do so.
摘要翻译：通过使用只有少数广泛分布的无线电基站（RBS）站点和现有寻呼网络基础设施的网络，提供普遍存在的无线数据通信服务的双向通信系统，例如遍及美国大陆的无线数据通信服务。寻呼网络基础设施用作出站链路以从远程现场单元请求数据。出站页面消息指示RBS可以期望从现场单元接收入站数据的时间和HF频率。网络集线器或任务操作中心（MOC）确定在特定现场单元将频率用作入站链路时期望传播和清除的射频。然后，MOC使用诸如寻呼网络基础设施的现有廉价无线系统向现场单元发出数据请求。现场单元利用寻呼接收机和HF发射机在请求时报告诸如地理位置或其它传感器数据的远程数据。

6. 发明授权

US06859485B2 Geolocation system with controllable tags enabled by wireless communications to the tags 有权
标题翻译：具有通过无线通信到标签启用的可控制标签的地理定位系统
公开(公告)号：US06859485B2
公开(公告)日：2005-02-22
申请号：US09798837
申请日：2001-03-02
申请人： Donald K. Belcher
发明人： Donald K. Belcher
IPC分类号： G01S5/02 , G01S5/06 , G01S13/82 , G01S13/87 , G06K17/00 , H04B1/69 , H04B1/713
CPC分类号： H04B1/69 , G01S5/02 , G01S5/06 , G01S13/82 , G01S13/878 , G06K17/00 , G06K2017/0045
摘要： An auxiliary wireless communication mechanism is incorporated into a system that geolocates tagged objects within a monitored environment, using random, repetitive spread spectrum emissions from the tags. The emissions are detected at tag emission readers, and processed by an object location processor to geolocate the tagged objects. The auxiliary wireless communication mechanism transmits a return spread spectrum signal containing information intended for a tag immediately in response to the object location processor geolocating the tag. This immediately returned spread spectrum transmission allows a reduced complexity spread spectrum receiver within the tag to despread the return signal without having to determine the timing of the clock signal used to produce it.
摘要翻译：辅助无线通信机制被并入系统中，该系统使用来自标签的随机，重复扩频发射来定位被监视环境内的标记对象。在标签发射读取器处检测到排放物，并由对象位置处理器进行处理以对标记的对象进行地理定位。辅助无线通信机构响应于对象位置处理器定位标签而立即发送包含用于标签的信息的返回扩展频谱信号。这种立即返回的扩展频谱传输允许标签内的降低复杂度的扩频接收机解扩展返回信号，而不必确定用于产生它的时钟信号的定时。

7. 发明授权

US06853687B2 Proximity-based magnetic field generator for controlling operation of RF burst-transmitting tags of geolocation system 有权
标题翻译：用于控制地理定位系统的RF突发传输标签操作的接近磁场发生器
公开(公告)号：US06853687B2
公开(公告)日：2005-02-08
申请号：US09759290
申请日：2001-01-11
申请人： Timothy C. Harrington , Ronald J. Hash , Donald K. Belcher
发明人： Timothy C. Harrington , Ronald J. Hash , Donald K. Belcher
IPC分类号： G01V15/00 , H04L27/00
CPC分类号： G01V15/00
摘要： An object tracking system for locating radio-tagged objects within a monitored environment has a plurality tag transmission readers that detect RF transmissions from the tags, and generate output signals representative of the time-of-arrival of first-to-arrive tag transmissions. An object location processor processes the first to arrive signals in accordance with a multilateration algorithm to geolocate a tag. In order to modify the operation of a tag that comes within a prescribed region of the monitored environment (such as passing through a doorway), one or more relatively short range, magnetic field proximity-based, tag-programming ‘pingers’, are placed proximate to the region. A magnetic field receiver on the tag detects the field generated by the pinger and causes the tag to change operation such as increase its RF transmission rate.
摘要翻译：用于在受监视的环境内定位无线电标签对象的对象跟踪系统具有检测来自标签的RF传输的多个标签传输读取器，并且生成表示第一到达标签传输的到达时间的输出信号。对象位置处理器根据多边算法处理第一个到达信号以对标签进行地理定位。为了修改在监视环境的规定区域（例如通过门口）中的标签的操作，放置一个或多个相对较短范围的基于磁场邻近的标签编程“平” 靠近该地区。标签上的磁场接收器检测由指孔产生的场，并使标签改变操作，例如增加其RF传输速率。

8. 发明授权

US06170748B2 Object identification system employing pulsed magnetic field-stimulated, tag-embedded transponder 有权
标题翻译：采用脉冲磁场刺激，标签嵌入式应答器的物体识别系统
公开(公告)号：US06170748B2
公开(公告)日：2001-01-09
申请号：US09159554
申请日：1998-09-24
申请人： Ronald J. Hash , Donald K. Belcher , Robert W. Boyd
发明人： Ronald J. Hash , Donald K. Belcher , Robert W. Boyd
IPC分类号： G06K708
CPC分类号： G06K7/083
摘要： An object orientation-independent information storage and retrieval system ‘tags’ an object with a compact, strip-embedded transponder containing object identification information. The transponder remains unpowered until the tagged object passes through a pulsed time-varying magnetic field generated by a tag reader. In response to a transponder coil sensing this interrogation magnetic field, the transponder extracts and stores energy from the incident field, powering up the transponder and stimulating the emission of an alternating magnetic field reply burst encoded with information stored in memory. The reply burst has the same frequency as the interrogating magnetic field burst, and is emitted by the transponder coil prior to receipt of the next interrogation burst.
摘要翻译：对象方向独立信息存储和检索系统使用包含对象识别信息的紧凑的带状嵌入式转发器“标记”对象。应答器保持未上电，直到被标记的对象通过由标签读取器产生的脉冲时变磁场响应于应答器线圈感测到该询问磁场，应答器从入射场提取并存储能量，为应答器供电并且激励用存储在存储器中的信息编码的交变磁场应答脉冲串的发射，响应脉冲串与询问磁场突发相同的频率，并且在接收到下一询问脉冲之前由应答器线圈发射。

9. 发明授权

US5661459A Proximity monitoring apparatus employing encoded, sequentially generated, mutually orthogonally polarized magnetic fields 失效
标题翻译：接近监测装置采用编码的，依次产生的相互正交的极化磁场
公开(公告)号：US5661459A
公开(公告)日：1997-08-26
申请号：US530653
申请日：1995-09-20
申请人： Donald K. Belcher
发明人： Donald K. Belcher
IPC分类号： G08B21/02 , G08B23/00
CPC分类号： G08B21/0263 , G08B21/0247
摘要： A proximity detector includes a low frequency magnetic field generator, located with an individual being monitored, the generator sequentially generating a plurality of encoded, time varying magnetic fields having mutually orthogonal polarizations. A magnetic field sensor unit is provided within a second device, carried by another individual. The magnetic field sensor unit is operative to detect encoded magnetic field energy associated with one or more of the magnetic fields generated by the magnetic field generator. Preferably, the magnetic field sensor unit includes a plurality of magnetic field sensors having respective magnetic field polarization sensitivities that are oriented mutually orthogonal with respect to one another. Each of the magnetic field sensors produces a respective first output signal in response to detecting encoded magnetic field energy generated by the magnetic field generator of at least a predefined level and containing an code pattern corresponding to that stored by the magnetic field sensor unit. A time-out circuit is coupled to each of the magnetic field sensors, and generates an alarm signal in response to a prescribed failure to receive a first output signal from any of the magnetic field sensors within periodic time intervals, thereby indicating that the monitored individual is beyond a prescribed range or distance from the monitoring individual.
摘要翻译：接近检测器包括低频磁场发生器，位于被监视的个体中，发生器顺序地产生具有相互正交偏振的多个经编码的时变磁场。磁场传感器单元设置在由另一个人携带的第二设备内。磁场传感器单元用于检测与由磁场发生器产生的一个或多个磁场相关联的编码磁场能量。优选地，磁场传感器单元包括具有彼此相互正交定向的相应磁场极化灵敏度的多个磁场传感器。每个磁场传感器响应于检测由磁场发生器产生的至少预定水平的编码磁场能量并且包含与由磁场传感器单元存储的代码模式相对应的代码模式，产生相应的第一输出信号。超时电路耦合到每个磁场传感器，并且响应于规定的故障产生报警信号，以在周期性时间间隔内从任何一个磁场传感器接收第一输出信号，从而指示所监视的个体超出监控人员的规定范围或距离。

10. 发明授权

US5659325A Low impedance loop antenna and drive circuitry 失效
标题翻译：低阻抗环路天线和驱动电路
公开(公告)号：US5659325A
公开(公告)日：1997-08-19
申请号：US352834
申请日：1994-12-02
申请人： Donald K. Belcher , Gregory H. Marquardt
发明人： Donald K. Belcher , Gregory H. Marquardt
IPC分类号： H01Q1/27 , H01Q7/00 , H01Q1/12
CPC分类号： H01Q7/005 , H01Q1/273
摘要： An antenna and method of minimizing capacitive effects of a capacitive body on a loop antenna. The antenna includes a loop antenna, a drive circuit for driving a current through the loop antenna, matching means for matching the impedance of the drive circuit and the loop antenna and a housing for carrying the loop antenna, drive circuit and matching means. The loop antenna is formed from a band of conductive material such that the flat sides of the band are normal to the plane of the loop. The loop antenna is carried by the housing when the housing is carried by a human body with its flat sides normal to the human body and its edges parallel to the human body. The orientation of the loop antenna relative to the human body minimizes the capacitive effect of the human body on the loop antenna and thus decreases the impedance to the flow of current through the loop antenna.
摘要翻译：一种使电容体在环形天线上的电容效应最小化的天线和方法。天线包括环形天线，用于驱动通过环形天线的电流的驱动电路，用于匹配驱动电路和环形天线的阻抗的匹配装置和用于承载环形天线的壳体，驱动电路和匹配装置。环形天线由导电材料带形成，使得带的平坦侧面垂直于环的平面。当外壳由人体携带时，环形天线由壳体承载，其平面与人体平行，其边缘平行于人体。环形天线相对于人体的方向最小化了人体对环形天线的电容效应，从而减小了通过环形天线的电流的阻抗。

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